In the face of the Muslim expansion, the Byzantine emperor Heraclius gathered a large army, lead by his brother Theodorus, which fought the Muslim army at the Battle of Yarmouk in August 639 AD.
The site lays on the banks of the Yarmouk River on the Northern tip of Jordan. The Muslim army was greatly outnumbered but their commander Khalid ibn Al-Walid led them to victory. This battle gave the Muslims control of Greater Syria.
In Mazar Al-Shamali, near Irbid, is a shrine for Prophet Dawud 'David' . As a child, he slew Jalut 'Goliath' with a sling and became the second King of Israel after Talut 'Saul'. Moreover, Prophet David was one of the apostles to whom heavenly scriptures were revealed. Prophet David spent some time in Jordan whilst at odds with Saul, as well as later while on a campaign.
The tomb of the venerable companion Abul-Dardaa is located in a modern building in the village of Soam Ashunnaq near Irbid. One of the most devoted and pious of the companions, he was always by the Prophet's side.
Abul-Dardaa is best known for surpassing everyone else in memorizing, narrating and transmitting Prophet Mohammad's hadith. He took part in military campaigns and was later appointed governor of the Bahrain province.